package sctu.edu.java.year2016.team03.huzhou.day20160524.chapter7_2;

/**
 * Created by Administrator on 2016/5/24.
 */
public interface Work7_2_2 {
    public static void main(String[] args) {
        Work7_2_1 one=new Work7_2_1();
        one.wide=21.0d;
        one.length=13.5;

        System.out.println("这个矩形的面积为"+one.Area());
    }
}
